The Culper Ring was a secret spy network established during the American Revolutionary War. Formed in 1778, it operated primarily in New York City and surrounding areas, gathering intelligence for the Continental Army. The group was crucial in providing information about British troop movements and plans, which helped the American forces make strategic decisions. Led by George Washington, the ring included key members like Abraham Woodhull and Robert Townsend. They used coded messages and invisible ink to communicate, ensuring their information remained confidential. The success of the Culper Ring significantly contributed to the American victory in the war.